Russia
Nicholas I (1825-1855) - Platinum 12 Roubles 1831 - Mint: St. Petersburg - Obverse: Crowned double imperial eagle - Reverse: Legend in four lines - gr. 41,42 - Very rare, only 1463 specimens struck. Very few marks on brilliant surfaces, extremely fine. Platinum metal composition 0.947 confirmed by spectography. Friedberg 158. Bitkin 47